Italian vs Romance

Italian and Romance both are nouns.

Word	Noun	Adjective	Verb	Adverb
Italian	Yes	Yes	No	No
Romance	Yes	Yes	No	No

As nouns, Romance is a hypernym of Italian; that is, Romance is a word with a broader meaning than Italian:

Other hypernyms of Italian include Latinian language, Romance language.

Italian (noun)	Romance (noun)
the Romance language spoken in Italy	the group of languages derived from Latin
a native or inhabitant of Italy

Italian (adjective)	Romance (adjective)
of or pertaining to or characteristic of Italy or its people or culture or language	relating to languages derived from Latin